Laboratory of Tree Ring Research

In 1937 A. E. Douglass, founder of the modern science of dendrochronology, established the Laboratory of Tree-Ring Research at the University of Arizona. The Tree-Ring Lab is recognized worldwide as a preeminent center for the advancement of tree-ring techniques and the broad application of dendrochronology in the social and environmental sciences.

Dendrochronology is the dating and study of annual rings in trees. Dendrochronologists use tree rings to answer questions about the natural world and the place of humans in its functioning. The practical applications of the study of tree rings are numerous. Dendrochronology is an interdisciplinary science, and its theory and techniques can be applied to many applications.

The new Bryant Bannister Tree-Ring Building (BBTRB) offers a fabulous opportunity to engage and educate UA students and their families, visitors and the public. The Laboratory of Tree-Ring Research (LTRR) is an iconic center of excellence on the UA campus, exemplifying the interdisciplinary nature and history of our institution. Great discoveries in archaeology, climatology, geology and ecology have been made at LTRR. Continuing work at LTRR is on the cutting edge of research and teaching in water, earth, fire, and archaeological sciences. Many superlative specimens and the science stories behind them are on display (or will be) in the new building for all to learn about, enjoy and to be inspired by.